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the verification, we recommend that you use the drmexgverify or EX_DRM_EXG_VERIFY

command to verify the database before performing restoration or backing up data to tape.

Note that, although an option is provided for the drmexgbackup or EX_DRM_EXG_BACKUP

command to delete transaction logs after backup without verification, if this option is used when

the database is corrupted, roll-forward recovery might not be able to be performed.

• The following are the files verified during database verification when backup is performed by using

VSS:

• Data files in the Information Store (*.edb)

• Transaction log files that have not been committed (*.log)

• Note on approximate periods required for database verification when a backup is performed by

using VSS:

• For Exchange Server 2003, Application Agent uses the ESEUTIL utility to verify databases.

The table below lists the approximate amount of time required to verify a database. Note that

the approximate amount listed in the table only apply under certain conditions, and are not a

guarantee product performance.

Table 4 Approximate amount required to verify Exchange Server 2003 database for backup

by using VSS

Amount of time

required for

database verifica-

tion

Number of transac-

tion log files

(*.log)

Capacity of the

data file (*.edb)

System configuration for the

database server

10 seconds2500 MB• CPU: Pentium 4 1.5 GHz

• Memory: 1 GB

• Storage system: XP128

35 seconds22 GB

• The following table lists the approximate amount of time required to verify a database for Ex-

change Server 2007.

Table 5 Approximate amount required to verify Exchange Server 2007 database for backup

by using VSS

Amount of time

required for

database verifica-

tion

Number of transac-

tion log files

(*.log)

Capacity of the

data file (*.edb)

System configuration for the

backup server

3 hours5500 GB

• CPU: 3.0 GHz x 2

• Memory: 6 GB

• Storage system: HP

XP24000

Application Agent system configurations72

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